ENVs for Database Initialization

[argctl]

Summary: When initializing the database, the initialization ignores the ENVs

Steps to reproduce:

1. Setup a new canvas instance
2. Set all the canvas config for the db
3. Run the db migration
4. Set envs for the OS as described in https://github.com/instructure/canvas-lms/wiki/Production-Start#database-population
5. Wait for it to finish

Expected behavior:

It should finish without prompting the user as described in: https://github.com/instructure/canvas-lms/wiki/Production-Start#database-population

i.e. Setting all of the values (like CANVAS_LMS_ADMIN_EMAIL) should result in no prompt.

Actual behavior:

It still prompts the user instead of running it silently.

Additional notes:

I've verified that the OS has all of the envs set globally and I've tried running the command with these values prefixed.

[grahhnt]

This still exists as of stable/2022-01-19